Koenig研究的理由是什么?
不能避免这样认为,使你的法典难以阅读和读取intable。
他们能否界定“Koenig”调查,以便它只处理具体案件(例如:非成员经营人)或明确要求?
Koenig研究的理由是什么?
不能避免这样认为,使你的法典难以阅读和读取intable。
他们能否界定“Koenig”调查,以便它只处理具体案件(例如:非成员经营人)或明确要求?
最初的动机,国际排雷中心,是能够书写
std::cout << 42;
without having to qualify std::operator<<(std::ostream&, int)
explicitely.
如果你想提出令人难以置信的争辩,那么你可以明确限定职能名称,即。 使用<代码>std:swap,而不是swap
,以防止swap<>/code>,在任何名称空间研究其论点。
也可以与SFINAE一道,在汇编某一类功能时测试某些功能(请你做这项工作,在Stackoverflow至少存在一个问题)。
英国广播公司使用最强的案例就是这种情况。
namespace A
{
struct S {};
S operator+( const S&, const S& );
}
namespace B
{
A::S test()
{
A::S a, b;
return a + b;
}
}
选择通用代码中的正确的<代码>swap功能也是有益的,因此该功能只应适用于operator
的功能。 它已经是标准的一个相当复杂的部分,使某些情况下无法开展工作的规则会进一步复杂,会有什么好处?
我可以想到,要求明确提出这种要求,比直接在一个不同的名称空间中要求一项职能少得多,而且无论如何使表达更加复杂。
我们再思考一下:return [[使用_adl] (a + b);
vsreturn A:operator+(a, b );
?
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